[CentOS] Re: DRBD NFS load issues

[Jed Reynolds]

Ugo Bellavance wrote:
> Jed Reynolds wrote:
>> Jed Reynolds wrote:
>>> Ugo Bellavance wrote:
>>>
>>>>
>>>> Can you send us the output of vmstat -n 5 5
>>>> when you're doing a backup?
>>>>
>>>
>>> This is with rsync at bwlimit=2500
>>>
>>
>> This is doing the same transfer with SSH. The load still climbs...and 
>> then load drops. I think NFS is the issue.
>>
>> I wonder if my NFS connection settings in client fstabs are unwise? I 
>> figured with beefy machine and fast networking, I could take 
>> advantage of large packetsizes. Bad packet sizes?
>
>
> Are you backing up nfs to nfs?  From where to where are you doing 
> backups?

The source data is on a ext3 partition, LVM volume, backed by a 15krpm 
raid 10 volume. Both rsyncs where conducted from the source host (the db 
server) to the backup server (which hosts nfs). In the nfs backup, I was 
rsyncing from the db filesystem to an NFS mount, and the ssh backup, I 
was rsyncing from the db filesystem to sshuser at backupserver:/backups.

Jed